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51 16 992 Disassembling and assembling lock barrel (lock barrel removed)

Sort supplied retainers (1) according to graphic.

(X) Embossed number on retainer (1)

(Y) Installation position in lock barrel

Fig 1: Identifying Retainers In Numerical Sequence
G06180372Courtesy of BMW OF NORTH AMERICA, INC.

Insert spring (1) into first position of lock barrel (2).

NOTE: Lock barrel version (2) differs according to vehicle.
Fig 2: Identifying Spring And First Lock Cylinder Position
G06180373Courtesy of BMW OF NORTH AMERICA, INC.

Insert retainer (1) with lowest stamped number (X) in first position (Y) in lock barrel (2) so that it snaps into place audibly.

NOTE: Number of retainers (1) differs according to vehicle.
Fig 3: Identifying Retainer And Lock Barrel
G06180374Courtesy of BMW OF NORTH AMERICA, INC.

Insert ignition key (1) in lock barrel (3) and check whether retainer (2) is flush with housing.

Fig 4: Checking Retainer Flushness
G06180375Courtesy of BMW OF NORTH AMERICA, INC.

If retainer (2) is not OK, press retainer (2) out of lock barrel (3) with a suitable tool (1).

Repeat work operations with retainer (2) with next higher number (X) until correct retainer (2) has been found.

Carry out all further positions in lock barrel as described in the process above.

Fig 5: Pressing Retainer Out Of Lock Cylinder Using Suitable Tool
G06180376Courtesy of BMW OF NORTH AMERICA, INC.